... material can be iron, steel and PE,PE is the best;The cable can be pulled and pushed easily,even reaches ... steel.The cable is good.But it is not the best.IIn this picture, the core is made of iron.The ... cable core is made of PE.The cable is the best.In this picture,the steel core,the iron core and ... the PE core is put together. marine,boat,ship push pull cable with PE core